and john kerry, if the president doesn't tap him for state. says he's still undecided about staying on. he reportedly told law students in baltimore thursday, "do i have some gas left in the tank? that's something i'm in the process now of trying to determine." >> these are intense, critical jobs and, yeah, there's a high burnout factor. >>> now at 5:00 tonight, a shocking resignation, the director of the cia steps down citing an extra merriarital aff >>> a shooting and chase that ends near the white house. >>> hear from the mailman who found an 81-year-old woman attacked in here home. good evening on this busy friday. we're going to begin with this breaking news. david petraeus resigns as director of the cia and he does so just a year after he takes that post. >> he has been married for 37 years but had an affair. nbc news broke the story two hours ago and kristen welker joins us live from the white house with reaction from the four-star yerl and from president obama. kristen? >> good evening, wendy and jim. this is stunning news for lawmaker